Current research interests

Funded Research Projects       Research Facilities

Surface plasmons supported by alloy thin films

In this project, we investigate the plasmons supported by alloy thin films composed. The effect of various parameters like alloying element, composition and structure are being investigated. Further details will be added soon.

Template driven assembly of anisotropic nanoparticles

In this project, we propose to use templates prepared by shadow sphere lithography for the assembly of anisotropic plasmonic nanoparticles. Further details will be added soon.

Graphene integrated metasurface devices

In this theme, active plasmonic devices are realized by integrating a single layer graphene with plasmonic metasurfaces. This integration enables the dynamic tuning of the plasmon resonance by application of a back gate voltage to graphene. We have demonstrated that such devices can be used to modulate the phase and polarization of the reflected wave. Furthermore, it is possible to extend this system so that it operates as a polarization detector or a polarimeter.

Relevant publications

  1. M. Jung, S. Dutta-Gupta, N. Dabidian, et al., Polarimetry using graphene-integrated anisotropic metasurfaces, ACS Photonics, 5, 4283-4288 (2018).
  2. Shourya Dutta-Gupta, et. al., Electrical Tuning of the Polarization State of Light Using Graphene-Integrated Anisotropic Metasurfaces, Phil. Trans. R. Soc. A., 375 (20160061) (2017).
  3. N. Dabidian*, S. Dutta-Gupta*, I. Kholmanov, et al., Experimental Demonstration of Phase Modulation and Motion Sensing Using Graphene-Integrated Metasurfaces Nano Letter, 16 (6), p. 3607-3615 (2016). (* - Equal contribution).

Eigenmode analysis

Modes of a plasmonic system provide significant insight into the properties of the structure. Specifically, we developed an eigenmode analysis based on the Green’s tensor approach, which can help in understanding both the bright and dark modes in a cluster of plasmonic nanoparticles. This analysis has been used to understand the second harmonic generation (SHG) from the surface of the nanoparticles in the cluster.

Relevant publications

  1. Shourya Dutta-Gupta and Olivier J.F. Martin, An insight into the eigenmodes of plasmonic nanoclusters based on Green's tensor method, JOSA B, 32 (2), pp 194-200 (2015). doi:10.1364/JOSAB.32.000194.
  2. Jeremy Butet, Shourya Dutta-Gupta and Olivier J.F. Martin, Surface second-harmonic generation from coupled spherical plasmonic nanoparticles: Eigenmode analysis and symmetry properties, Physical Review B, 89, pp 245449 (2014). doi:10.1103/PhysRevB.89.245449.

Fabrication and characterisation of plasmonic nanostructures

For practical applications, it is vital to develop nanofabrication techniques that can be used for fabricating plasmonic nanostructures at a fast pace and be cost-effective. Nanoimprint lithography is a promising technique that has the potential to meet both the aforementioned requirements.

Relevant publications

  1. A. Farhang, B. Abasahl, S. Dutta-Gupta, A. Lovera, P. Mandracci, E. Descrovi, O. J. F. Martin, Broadband wide-angle dispersion measurements: Instrumental setup, alignment, and pitfallsâ.., Review of Scientific Instruments, 84, p. 033107 (2013). doi:10.1063/1.4795455
  2. V. Auzelyte, V. Flauraud, Ch. Santschi, B. Gallinet, S. Dutta-Gupta, Olivier J.F. Marin and J. Brugger, Direct nanoimprint of gold plasmonic nanostructures using gold-parylene bilayer, Advanced Optical Materials, 1 (1), p. 50-54 (2013). doi:10.1002/adom.201200017.

Funded research projects

  1. Simultaneous monitoring of multiple cytokines via SERS signals using critically coupled optical perfect absorber sensor substrates
    Agency: DST-Nanomission
    Funding: ~49.5 Lakhs
    Duration: 2019-2022​
  2. Spinodal decomposition in Cu-Ag alloy thin films: A route to tunable plasmonics
    Agency: SERB-Early Career Research Grant
    Funding: ~49.7 Lakhs
    Duration: 2019-2022​
  3. On-demand real time ultra-sensitive cytokine profiling with integrated nano- plasmonic platform
    Agency: SERB - Ramanujan Fellowship
    Funding: ~35 Lakhs
    Duration: 2018-2023